Amazon brings to a very new Gadget that is a led flashing backpack on offer, So the offer comes is you can buy online 'NEW' design with FLASHING LED trim. 'Hydration Pack' with a 2 liter 'Hydration Bladder'. This 'Hydration Backpack' comes in Blue, Red and Green. Perfect 'running pack', 'cycling pack' or 'hiking pack'. Full size 19.5 x 11.5 inches at Rs.6207 from amazon.in.